One type of archaeon, Haloquadratum walsbyi, is shaped like a postage stamp with dimensions of 2 µm x 3 µm x 0.25 µm. What advantage would this shape provide?
A. This shape increases the surface to volume ratio enabling more efficient nutrient uptake.
B. This shape is more conducive to the formation of biofilm communities.
C. This shape is difficult for phagocytic cells to attach to and engulf.
D. This shape enables this bacteria to float on surfaces and obtain better light exposure.
Answer: A
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What will be an ideal response?
The metabolic reactions that occur in all cells require a certain molecule that was also believed to be present very early on Earth. What is this molecule?
a. nitrogen b. carbon c. water d. oxygen e. hydrocarbon
Humans evolved from chimpanzee's roughly 7 million years ago.
a. true b. false
Which of the following statements is false?
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